Regular Article - Theoretical Physics
Low mass Higgs signals at the LHC in the Next-to-Minimal Supersymmetric Standard Model
School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, UK
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Revised: 10 March 2011
Published online: 15 April 2011
In the NMSSM, because of introducing a complex singlet superfield, the lightest CP-odd Higgs boson, a 1, can be a singlet-like state with a tiny doublet component in large regions of parameter space. In this paper, we examine the discovery potential of a 1 produced in association with a bottom–antibottom pair at the LHC through τ + τ − and γγ decay modes. It is shown that an a 1 with mass ≤M Z can be extracted from the SM backgrounds by using the τ + τ − decay channel, a possibility precluded to the MSSM. In contrast, the γγ decay mode is overwhelmed by backgrounds despite the fact that the branching ratio of this mode can reach unity when a 1 is a pure singlet.
© Springer-Verlag / Società Italiana di Fisica, 2011